Diehr P, Martin DP, Leickly R, Krueger L, Silberg N, Barchet S. Use of ambulatory health care services in a preferred provider organization. Med Care. 1987 Nov;25(11):1033-43.
Diehr P, Martin DP, Leickly R, Krueger L, Silberg N, Barchet S. Use of ambulatory health care services in a preferred provider organization. Med Care. 1987 Nov;25(11):1033-43.